Update models to have more relationships and timestamp column definitions.

workflow/engine/src/ProcessMaker/Model/Task.php

@@ -7,6 +7,8 @@ use Illuminate\Database\Eloquent\Model;
 class Task extends Model
 {
     protected $table = 'TASK';
+    // We do not have create/update timestamps for this table
+    protected $timestamps = false;
 
     public function process()
     {